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authorChuck Lever <chuck.lever@oracle.com>2012-03-01 17:01:23 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-03-02 17:18:04 -0500
commit31b8e2aec099f22d40277c424d8c24b2a4c95fce (patch)
tree47092ef0ac344736a78afadd71e4808e4fe63dcc /fs/nfs/client.c
parent2e738fdce22f9a7edf20281fd2d768ef9785922e (diff)
NFS: Make clientaddr= optional
For NFSv4 mounts, the clientaddr= mount option has always been required. Now we have rpc_localaddr() in the kernel, which was modeled after the same logic in the mount.nfs command that constructs the clientaddr= mount option. If user space doesn't provide a clientaddr= mount option, the kernel can now construct its own. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/client.c')
-rw-r--r--fs/nfs/client.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index d038dc5916e..d30dcbfb6b2 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -1346,6 +1346,7 @@ int nfs4_init_client(struct nfs_client *clp,
rpc_authflavor_t authflavour,
int noresvport)
{
+ char buf[INET6_ADDRSTRLEN + 1];
int error;
if (clp->cl_cons_state == NFS_CS_READY) {
@@ -1361,6 +1362,20 @@ int nfs4_init_client(struct nfs_client *clp,
1, noresvport);
if (error < 0)
goto error;
+
+ /* If no clientaddr= option was specified, find a usable cb address */
+ if (ip_addr == NULL) {
+ struct sockaddr_storage cb_addr;
+ struct sockaddr *sap = (struct sockaddr *)&cb_addr;
+
+ error = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr));
+ if (error < 0)
+ goto error;
+ error = rpc_ntop(sap, buf, sizeof(buf));
+ if (error < 0)
+ goto error;
+ ip_addr = (const char *)buf;
+ }
strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
error = nfs_idmap_new(clp);